Evening Primrose - Yellow

Evening Primrose - Yellow: variety and characteristics

Evening Primrose - Yellow (Oenothera biennis) is a biennial flower of the Onagraceae family. Evening primrose gives off a pleasant evening fragrance in the garden.

It has large, pale yellow, bowl-shaped flowers that open in the evening and attract night-flying pollinators such as moths.

In modern medicine it is used to make an oil that is claimed to regulate hormone levels and may help with premenstrual stress and the menopause.

Evening primrose can grow to an average height of about 1 m.

Evening primrose is a versatile plant with many medicinal and culinary uses.

The seeds can be added to baked goods or roasted in the oven, or sprinkled on as an alternative to black pepper.

The seeds contain various amino acids, including lysine, proline, aspartic acid, tyrosine, glycine, leucine, glutamic acid and serine.

Evening primrose opens its yellow flowers at dusk and is fragrant; the seeds yield a valuable oil.

Key features

• Measured germination rate of the batch: 85%
• Seeds per packet: 1275–1725 pcs (0.6 g)
• Seed origin: Poland
• Sowing: February and March; direct
• Flowering: May – September
• Position: sunny spot

When to sow Evening Primrose - Yellow

Evening Primrose - Yellow seeds are sown in February and March. The plants flower from May to September. The months are a guide for a temperate climate — in warmer areas sow 1–2 weeks earlier, in cooler or upland areas, later.

How to sow and grow Evening Primrose - Yellow

• Sowing method: direct
• Depth: on the surface
• Spacing: 30 cm
• Germination: 10–20 days
• Position: sunny spot

Loves sun to partial shade. Prefers moist but well-drained sandy soil. The best way to grow evening primrose is from seed. Sow evening primrose seeds in early/late spring in pots or outdoors. The seeds can also be sown in late summer/autumn. Sowing depth: 1 cm. Flowering: early summer to early autumn. If growing in pots, make sure you plant the young plants out in their first year, because they are biennial (flowering in the second year) and have a long taproot that can be damaged if transplanted in the second year. In its first year, evening primrose will form a rosette of long, green, lance-shaped leaves, often with a reddish tinge. In their second year they will form a flower stem from which large, cup-shaped yellow flowers will grow. Not recommended for pregnant or breastfeeding women.

Undemanding, self-seeding.

Flowering and uses

Flowers from the second year.

Frequently asked questions

When should Evening Primrose - Yellow be sown?

The recommended sowing months are February and March. Sowing method: direct.

How many seeds are in the packet?

The packet contains 1275–1725 seeds, pack size 0.6 g.

What is the germination rate of the seeds?

The measured germination rate of this batch is 85%. The test was carried out under controlled laboratory conditions; in the field, emergence depends on soil, temperature and moisture.